Improved machine for disintegrating wood for paper-pulp



UNITED ,STATES PATENT OEEICE.

IIEZEIAH DODGE, OF ALBANY, NEW YORK.

IMPROVED MACHINE FOR DISINTEGRATING WOOD FOR PAPER-PULP.

Specification forming part of Letters Patent No. 99,071, dated January 25, 1870.

To all whom it may concern:

Be it known that I, HEZEKIAH DODGE, of Albany, in the county of Albany and State of N ew York, have invented an improved machine for grindingrwood to pulp, which I term an Improvement in Machinery for Disintegrating -Vood for Paper-Pulp, of which the following is a specification. y

The nature and objects of my invention consist in feeding bars or blocks of suitable wood into the conical grinder, (shown in drawings,) where the end of the bar of wood is ground at a taper, not cut, by the steel movable grinding-edges, (also shown,) the fibrous shreds of wood passing out on the sides as ground off. By this method of conical grinding the whole of the wood is reduced to fiber, for as one bar is ground up into the cone another is fed up against it, and so on ad infinitum.

The grinder is held by a lathe-chuck or revolved by gearing; or it may be stationary, and the wood revolved against it, all as more especially hereinafter specified and shown.

In the accompanying drawings, Figure l is a perspective view of a vertical transverse section of one-half of a machine embodying my invention. Fig. 2 is a perspective view of the tool or machine complete.

In these drawings, a and a, Fig. 2, form the hollow cone. b and b are the grinding-edges, attached by the screws c and c.

At d is shown a flange-ring, surrounding and holding in place the sections of the hollow cone a and a. It (d, the flange-ring) is attached to the power by gearing, chuck, or otherwise, and, as it revolves, turns the iinproved grinder. introduced in the direction shown by the straight arrow in Fig. 2, the machine meanwhile rapidly revolving in the direction shown by the curved arrow.

At b, Fig. 1, is shown a grindingedge, with the slots which enable it to be adjusted and set for iine or coarse grinding.

The screws shown at c, when screwed down tight, hold the grindingedge in position. The steel grinding-edges projecting a proper distance inward7 the wood is ground off at a taper in iibrous shreds, and passed out through the openings over the grinding-edges. The wood is constantly supplied, a fresh bar upon the stub of the last, so that there is no waste or remnant, but all the wood is ground up.

I claim as my inventionl. The grinding or disintegration of wood at a taper, by the use of one or more of the adjustable grinding-edges b, set in a hollow cone or its equivalent, a, held by the iiangering d, in such manner as to be readily attached to machinery for revolving the grinder.

2.y The combination of one or more of the adjustable grinding-edges b, of steel or other suitable material, set at a taper or angle converging with the hollow guiding-cone a, the screws c, the flange-ring d, all essentially as hereinbefore shown and described, and substantially as exhibited in drawings, and for the purpose before mentioned.

HEZEKIAH DODGE.

Witnesses:

W. W. J. RICE, ALFRED GAGE.

The wood to be ground is, 

